We are a small company and our mail are hosted by Yahoo Business Email. We have installed and configured ISA 2004 on our network and the HTTP traffic is setup sucessfully, it is allowed through. The users can access their mail through HTTP but not through POP or SMTP using Outlook. I don't know where to configure ISA 2004 to allow POP & SMTP traffic. I have setup Rules for incoming and outgoing pop & smtp and allowed all users but still no luck! Can anyone tell me what I'm doing wrong? The ISA 2004 is running on a Win2003 and is added to the DC.